Spirit-level and plumb.



UNllED 4STATES PATENT Ormes.

GEORGE F. QUINBY, OF BOSTON, MASSACHUSETTS.

SPIRIT-LEVEL AND` PLUMB.

SPECIFICATION forming part of Letters Patent No. 657,675, dated September 11, 1900. Application sled March s, 1900. serial No.' 7,761. (No model.)

To @ZZ whom it may concern:

Be it known that I, GEORGE F. QUINBY, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvelnents in Spirit-Levels and Pllllnbs, of which the following is a description sufciently full, clear, and exact to enable those skilled ill the art to which it appertains or with which it is most nearly connected to make and use the same.

This invention has relation to leveling or plu nlbing instruments generally, and particularl y to that class of such instruments wherein a spirit-level is employed to ascertain levels or inclinations, the object ot' the invention being to so mount a spirit-level upon a support. forming part of the instrument that when such support is placed against the work the spirit level or bottle will assume an upright position or a position with its sight side uppermost, where it may be readily seen.

In carrying out the invention it is proposed to hang the level cradle-like in a certain longitudinal relation to its support, so that however the latter may be placed upon the work, whether against the top, bottom, or side of the same, the spirit-level may by its own gravity swing to upright position-fi. c., to position where its sight side is uppermost, it being well known that the bottle of a spiritlevel is generally visible on but one side of its casing.

Reference is to be had to the annexed drawings,and to the letters marked thereon, forming a part of this speciiicaion, the saine letters designating the same parts or features, as the case may be, wherever they occur.

Ot' the drawings, Figure I is a perspective view showing the invention as applied to a har on the apex or top of an angular base. Fig. 2 is a side View with the base broken olf to econolnize space on the drawings. Fig. 3 is an end View showing by means of dotted lines a changed relation of parts. Fig. 4 shows in elevation an instrument capable of employment both as a level and plumb, the ends of the base or support being broken oi`1e for econonly of space on the drawings.

In the drawings, Figs. l to 3, inclusive, a designates the base, which is angular in crosssection and comprises sides standing at right angles to each other with bottom edges in the same plane and a bar h, formed integral with said sides Vand extending along the top or apex of the base. Erected on this bar are two upright standards c c, between which on pin-point bearings d d the spirit-level proper, c, is hung by means of two ears springing from the ends of the case which holds the spirit-bottle and which has the usual sightopening on the side from which said ears extend. With this construction, suppose it was proposed to level a shaft by placing the angular sides of the base a against the shaft, belowit, or on its sides. The level willin each case assume an upright position, and the user will have suicient room and opportunity to examine the level and the position of the bubble therein.

It will be understood from an inspection of the drawings and from the description thus far given that the spirit level proper is brought to and maintained in a level position by its own gravity, and this is an essential feature of the invention, whatever may be the form of the base or frame or however the spirit-level may be pivoted on its support.

In Fig. 4 I have shown my improvementin an oblong frame or bar, and exhibit the latter as provided with a plumb p, constructed and arranged in substantially the same way as the spirit-level. This is but to show the forms and arrangements that may be made in the connections and use of the invention without departing from the natllre or spirit of the ilnprovem ents. In this last-mentioned ligure the spirit-level proper e is hung on pinpivots in the same way and for the same purpose as ill the other figures.

In Fig. 3 I have showll by dotted lines how the spirit-level support may be inverted While the spirit-level proper maintains its upright position by swinging on its pivots, as described. It is not thought necessary to go into further details concerning the manner of using the device.

Numerous variations can of collrse be made in the form of the support or base, as also in the form of means for mounting the spirit- IOO to the work and the spirit-level is mounted thereon so as to maintain a certain longitudinal relation thereto and by its own gravity remain right side up.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patenti of the United States, is-

1. An instrument of the characterdescribed comprising a suitable support for application to the work, and a spirit -level pivotally mounted on said support with its axis lengthwise ofthe spirit-level,l the latter maintaining its longitudinal relation to the support with the right side uppermost.

2. An instrument of the character described comprising a suitable support for application to the work, and a spirit-level pivoted at its ends to said support and free to swing on an axis lengthwise of the spirit-level, the latter maintaining its longitudinal relation to the 2o support, substantially as described'.

3. An instrument of the character described comprising a suitable support for application to the Work, said support having confronting and alining bearings; and a spirit-level engaged at its ends with said bearings and free to swing on an axis extending lengthwise of the spirit-level, the latter maintaining its longitudinal relation to the su pport, substantially as described.

In testimony whereof I have signed my name to this specication, in the presence of two subscribing witnesses, this 6th day of March, A. D. 1900.

GEORGE F. QUINBY.

Witnesses:

ARTHUR W. CRossLEY, ANNIE J. DAILEY.

Corrections in Letters Patent No, 657,675

i upon the application of George F. Quinby,

l ing correction, as follows: On page 1, line 63, after the word shaft be inserted;

It is hereby certified that in Letters Patent No. 657,675,

of Boston, Massachusetts, for an improvement in Spirit-Levels and Plurnbs, errors appear in the printed Specification requira Comma should line 65, saine page, the period after the Word sides Z should be stricken out and a comma inserted, and the following Word the should begin with a email Lft, thus making a continuous sentence; and page read sight; and that the said Letters 2, line 14, the Word right should Patent should be read with these corrections l therein that the sanne may conform to the record of the ease in the Patent Oiee.

Signed, eountersigned, and sealed this 25th day of September, A. D., 1900.

F. L. CAMPBELL, Assistant Secretary of the Interior.

[SEAL] Countersigned VALTER H. CHAMBERLIN,

Acting Commissioner of Patents.

granted September 11, 1900, 

